Merge branch 'master' of git://git.denx.de/u-boot-arm

[kernel/u-boot.git] / doc / README.ext4

diff --git a/doc/README.ext4 b/doc/README.ext4
index b3ea8b7..9a2de50 100644 (file)
--- a/doc/README.ext4
+++ b/doc/README.ext4
@@ -1,44 +1,57 @@
 This patch series adds support for ext4 ls,load and write features in uboot
 Journaling is supported for write feature.
 
 This patch series adds support for ext4 ls,load and write features in uboot
 Journaling is supported for write feature.
 

+To enable support for the ext4 (and ext2) filesystem implementation,
+#define CONFIG_FS_EXT4
+
+If you want write support,
+#define CONFIG_EXT4_WRITE
+

 To Enable ext2 ls and load commands, modify the board specific config file with
 #define CONFIG_CMD_EXT2
 To Enable ext2 ls and load commands, modify the board specific config file with
 #define CONFIG_CMD_EXT2

+This automatically defines CONFIG_FS_EXT4 for you.

 
 To Enable ext4 ls and load commands, modify the board specific config file with
 #define CONFIG_CMD_EXT4
 
 To Enable ext4 ls and load commands, modify the board specific config file with
 #define CONFIG_CMD_EXT4

+This automatically defines CONFIG_FS_EXT4 for you.

 
 To enable ext4 write command, modify the board specific config file with
 #define CONFIG_CMD_EXT4
 #define CONFIG_CMD_EXT4_WRITE
 
 To enable ext4 write command, modify the board specific config file with
 #define CONFIG_CMD_EXT4
 #define CONFIG_CMD_EXT4_WRITE

+These automatically define CONFIG_FS_EXT4 and CONFIG_EXT4_WRITE for you.
+
+Also relevant are the generic filesystem commands,
+#define CONFIG_CMD_FS_GENERIC
+This does not automatically enable EXT4 support for you.

 
 Steps to test:
 
 1. After applying the patch, ext4 specific commands can be seen
    in the boot loader prompt using
 
 Steps to test:
 
 1. After applying the patch, ext4 specific commands can be seen
    in the boot loader prompt using

-        UBOOT #help
+       UBOOT #help

 
 

-        ext4load- load binary file from a Ext4 file system
-        ext4ls  - list files in a directory (default /)
-        ext4write- create a file in ext4 formatted partition
+       ext4load- load binary file from a Ext4 file system
+       ext4ls  - list files in a directory (default /)
+       ext4write- create a file in ext4 formatted partition

 
 2. To list the files in ext4 formatted partition, execute
 
 2. To list the files in ext4 formatted partition, execute

-        ext4ls <interface> <dev[:part]> [directory]
-        For example:
-        UBOOT #ext4ls mmc 0:5 /usr/lib
+       ext4ls <interface> <dev[:part]> [directory]
+       For example:
+       UBOOT #ext4ls mmc 0:5 /usr/lib

 
 3. To read and load a file from an ext4 formatted partition to RAM, execute
 
 3. To read and load a file from an ext4 formatted partition to RAM, execute

-        ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
-        For example:
-        UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
+       ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
+       For example:
+       UBOOT #ext4load mmc 2:2 0x30007fc0 uImage

 
 4. To write a file to a ext4 formatted partition.
 
 4. To write a file to a ext4 formatted partition.

-        a) First load a file to RAM at a particular address for example 0x30007fc0.
-        Now execute ext4write command
-        ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
-        For example:
-        UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
-        (here 6183120 is the size of the file to be written)
-        Note: Absolute path is required for the file to be written
+       a) First load a file to RAM at a particular address for example 0x30007fc0.
+       Now execute ext4write command
+       ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
+       For example:
+       UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
+       (here 6183120 is the size of the file to be written)
+       Note: Absolute path is required for the file to be written

 
 References :
        -- ext4 implementation in Linux Kernel
 
 References :
        -- ext4 implementation in Linux Kernel